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No. 770,400. I 'PATBNTED SEPT. 20, 1904. H. B. TAGUB.

ROTARY TOOTH BRUSH.

APPLIOATION FILED MAY 19, 1904.

NO MODEL.

M225. 2. 1 07 J @Lgm-I gnw UNITED STATES Patented September 20, 1904.

PATENT OFFICE.

ROTARY TOOTH-BRUSH.

SPECIFICATION forming part of Letters Patent NO. 770,400, dated- S pt r 20, 1904.

Application filed May 19,1904.

T0 @ZZ whom it may concern:

Be it known that I, HOMER E. TAGUE, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Rotary Tooth-Brushes, of which the following is a specification.

My invention pertains to rotary toothbrushes; and it has for its object to provide a rotary tooth-brush which is a material simplification of those extant and is at the same time strong and durable, and consequently well adapted to Withstand the usage to which such devices are ordinarily subjected.

The invention will be fully understood from the following description and claim when taken in connection with the accompanying drawings, forming part of this specification, in which Figure 1 is a view, partly in side elevation and partly in longitudinal section, of my improved rotary tooth-brush. Fig. 2 is a side elevation taken at right angles to Fig. 1. Fig. 3 is a detail view of the spindle of the brush. Fig. 3 is a sectional detail View of the brush of the device, and Fig. 4 is an elevation of the slide of the device removed.

Similar letters of reference designate corresponding parts in all of the views of the drawlngs.

In the present and preferred embodiment of my invention the improved tooth-brush comprises a tubular casing A, which has a central aperture (0 at one end and is exteriorly threaded, as indicated by 6, at its opposite end and is provided with diametrically opposite longitudinal slots 0, which extend to the threaded end, as shown in Fig. 1; an interiorlythreaded cap B, screwed on the end of the casing A and having a finger-ring d; a spindle C, snugly occupying the casing A and having a spiral slot 6, which extends diametrically through it, and also having a reduced forward portion f, and a brush D, which per 86 may be of any construction compatible with the purposes of my invention, screwed on or otherwise fixed to the reduced forward portion of the spindle C. The novel brush also comprises a reciprocatory slide E. This lat- Serial No. 208,706. (No model.)

ter comprises finger-rings g and a rod it, interposed between the saidfinger-rings and designed to extend crosswise through the slots 0 of the casing A and the spiral slot 6 of the spindle C after the manner shown in Figs. 1 and 2.

In assembling the parts of my novel toothbrush the spindle C is placed in the casing A and the slide E is placed in the casing and in the spiral slot of the spindle precedent to screwing the cap B on the threaded end of the casing, after which the brush D is screwed on or otherwise secured to the forward reduced portion of the spindle. In this way it will be observed that the parts of the novel brush may be brought together in operative relation with great facility, and it will also be observed that the parts may be as readily disconnected with a view of facilitating cleansing of the same.

In the practical use of the brush the user places his thumb in the ring (Z of cap 13 and two of his fingers in the rings 9 of the slide E and by reciprocating the said slide E rapidly rotates the spindle C and the lorushD on their axes, the brush being of course held against the teeth.

As will be readily appreciated by reference to Fig. 1 of the drawings, the spindle C, snugly occupying the casing A and having the spiral slot 6, and the slide E, having the rod it extending through the casing and the slotted spindle, contribute materially to the strength and durability of the brush, and hence the same is not likely to be broken or impaired after a short period of use.

Notwithstanding the simplicity of my novel brush, as pointed out in the foregoing, it will be noted that the same is highly efficient in operation and is adapted to be manipulated with but a minimum amount of effort.

I have entered into a detailed description of the construction and relative arrangement of the parts embraced in the present and preferred embodiment of my invention in order to impart a full, clear, and exact understanding of the same. I do not desire, however, to be understood as confining myself to such specific construction and relative arrangement of parts, as such changes or modifications may be made in practice as fairly fall within the scope of my invention as claimed.

Having described my invention, what I claim, and desire to secure by Letters Patent,

The herein-described rotary tooth-brush consisting essentially of the tubular casing threaded at its rear end and having a central aperture in its forward end, and also having diametrically opposite longitudinal slots which extend from a point adjacent to its forward end to its threaded end, a screw-threaded cap engaging the threaded end of the casing, a spindle corresponding in diameter to the interior of and snugly occupying the casing and having a spiral slot 0 which extends crosswise through it, and also extends to the rear end of the spindle, and also having a reduced forward portion extending through the aperture in the forward end of the casing, a brush fixed on said portion f of the spindle, and a slide movable longitudinally of the casing and having a rod 71 extending crosswise through the slots of the casing and the spiral slot 0 of the spindle, and also having rings g at the ends of the said rod h.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- DQSSBS.

HOMER E. TAGUE.

Witnesses:

ANNA M. ROHDE, FRANK R. HUGT. 

